Differentiate between Lapping and Buffing process.

Differentiate between Lapping and Buffing process. 
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1 Answer

Answer :

difference between Lappin and Buffing process :

Sr. No. 
Lapping
Buffing
1 Lapping is a finishing process in which tool used is called as lap.  
Buffing is finishing process in which tool used is called as buffing wheel.  
2 The lapping process involves passing a part between one or two large flat-lap plates or wheels. 
In this process, work piece is brought in contact with a revolving, cloth buffing wheel that has been charged with very fine abrasive 
3 The process is used to correct minor imperfections of shape, refines surface finish. 
Buffing is used to give higher, lustrous, reflective finish. 
4 Lapping removes more material than buffing.
Buffing removes minute ammout of metal than lapping.  
5 Applications:
A. Hand lapping is used for
i. Press work dies ii. Moulding dies
iii. Limit gauges iv. Surface plates 
v. Engine valve and valve seat
B. Machine lapping is used for
i. Races of ball and roller bearings
ii. Gears iii. Piston rings
iv. Slip gauges
v. Crankshaft.  
Applications: Automobiles, motor-cycles, boats, bicycles, sporting items, tools, store fixtures, commercial and residential hardware and household utensils and appliances.  
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